Architectural Flashing Supply
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Material takeoffs and quantity reconciliation · Lesson 2 of 4

Material takeoffs and quantity reconciliation: materials, standards and design constraints

How the 48 in sheet turns a girth into strips, AFS's standard and maximum piece lengths, what Drexel and Petersen print for lengths, cleats, nails and splice plates, mill widths, gauge and weight, drawing units, and where SMACNA fits.

You will be able to: Name what fixes the numbers in a takeoff: the 48 in sheet, strips per sheet, AFS's two piece lengths, a manufacturer's stock lengths and accessories, gauge and weight, drawing units, and where standards fit.

12 min · 11 slides · 9 questions

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Slide 1 of 11

Sheet and strip geometry

Strips per sheet is 48 divided by the blank width, rounded down.

A gravel stop with an 8.375 in girth gives 5 strips: 48 / 8.375 is 5.73, rounded down.

A blank wider than 48 in cannot be cut from an AFS sheet, so it is refused rather than guessed.

Share of a 48 in sheet used, by profile girthHorizontal bar chart of six AFS profiles, each bar the share of the 48 in sheet width used when whole strips are cut. Cleat 4.5 in, 10 strips, 93.8 percent. Z Flashing 8 in, 6 strips, 100 percent. Gravel Stop 8.375 in, 5 strips, 87.2 percent. Econo Coping 9.625 in, 4 strips, 80.2 percent. Drip Edge with back flange 13.25 in, 3 strips, 82.8 percent. Coping with no hem 24.75 in, 1 strip, 51.6 percent.Share of the 48 in sheet width used (%)Cleat93.8% used4.5 in, 10 stripsZ Flashing100.0% used8 in, 6 stripsGravel Stop87.2% used8.375 in, 5 stripsEcono Coping80.2% used9.625 in, 4 stripsDrip Edge, back flange82.8% used13.25 in, 3 stripsCoping, no hem51.6% used24.75 in, 1 strip0%50%100%100%: no width left over

Horizontal bar chart of six AFS profiles, each bar the share of the 48 in sheet width used when whole strips are cut. Cleat 4.5 in, 10 strips, 93.8 percent. Z Flashing 8 in, 6 strips, 100 percent. Gravel Stop 8.375 in, 5 strips, 87.2 percent. Econo Coping 9.625 in, 4 strips, 80.2 percent. Drip Edge with back flange 13.25 in, 3 strips, 82.8 percent. Coping with no hem 24.75 in, 1 strip, 51.6 percent.

AFS register values: girth is the sum of each FlashDraft template's legs to the sharp corner, with no hem allowance, and strips per sheet is 48 divided by the girth, rounded down. A girth that divides 48 evenly leaves no width over; 24.75 in leaves almost half the sheet.

Sources

Glossary

Strips per sheet
The number of strips of one blank width that come out of a 48 in sheet: 48 divided by the blank width, rounded down.
Standard and maximum piece length
At AFS the standard piece is 10 ft and the longest piece AFS can make is 126 in (10 ft 6 in). A takeoff states which one it counted on.
Coil piece
A piece longer than 10 ft. AFS's Material Takeoff tool lists it separately from the sheet strips and never nests it.
Splice plate
A short plate placed behind a joint between two lengths. Petersen's gravel stop guide calls for one at every joint.
Units code
The number a CAD file uses to say what its drawing units are. AFS's reader recognises five and treats any other as no usable scale.